Tolumnia Stål

Hasan & Ahmad’s species were based primarily on differences in the spermathecal bulb (having one finger-like projection versus two or more; this is a character that can vary within a single species). Breddin indicated that immaculata may have a shorter ostiolar peritreme (I need to check this). Distant described maxima as being larger, and somewhat similar to Halyomorpha in size and appearance. I have not checked the descriptions of horni or papulifera yet.

1 Rostrum elongate, reaching well onto the fourth or fifth abdominal sternite; relatively large medial pale spot on anterior disk of pronotum (Philippines)	longirostris (Dallas)
- Rostrum much shorter, reaching to or at most slightly beyond posterior margin of hind coxae; anterior disk of pronotum lacking medial pale spot, at most irregularly and only slightly pale in this area	2

2(1) All antennal segments black, although basal areas of some segments may be pale (India)	antennata Distant
- At least segments two and three of antennae pale, segment one usually pale, but may be darkish, segments four and five usually blackish, but each with pale basal area	3

3(2) Tylus usually nearly impunctate, paler in color than juga; apices of anterior tibiae usually distinctly dilated; relatively large pale spot in each basal angle of scutellum; usually with relatively large black spots or bands on legs, especially on joint between femur and tibia, and on apex of each tibia (southeast Asia, Malaysia, western Indonesia)	latipes (Dallas)
– Tylus usually with some punctures, nearly concolorous with juga; apices of anterior tibiae usually not dilated, if dilated, then only slightly so; basal angles of scutellum with or without pale spots; legs often speckled with brown or black, but usually lacking well defined black spots or bands as described above	4

4(3) Basal angles of scutellum with relatively large pale spots (Java)	trinotata (Westwood)
– Basal angles of scutellum either lacking pale spots, spots very tiny, or pale area extensive, forming irregular band across base of scutellum	5

5(4) Antennal segment five black on apical half, pale on basal half; dark bands on connexiva relatively broad, each connexival segment divided into thirds - black, pale, black (China, Taiwan)	gutta (Dallas)
– Antennal segment five black with pale area limited to basal one fourth or less; dark bands on connexiva relatively narrow, pale area taking up at least half of each connexival segment (China, India, Thailand, Philippines)	basalis (Dallas)